Radiation effect on the luminescence of LiYF4 : Er3+

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Radiation effect on the luminescence of LiYF4 : Er3+

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Title: Radiation effect on the luminescence of LiYF4 : Er3+
Author: DESHPANDE, SP; DHOBLE, SJ; POKALE, WK; DESHMUKH, BT; PODE, RB; GUNDURAO, TK
Abstract: Luminescence and also the effects of ionising radiation on luminescence have been investigated in LiYF4:Er. The defects created by ionising radiation are studied by means of Thermally Stimulated Luminescence (TSL) and Electron Spin Resonance (ESR). TSL studies indicate a prominent glow peak at 386-412 K, whose position is found to depend on the radiation dose. Two defect centres, tentatively assigned to F-centres, are observed at room temperature. Step annealing measurements suggest a connection between these centres and the TSL glow peak. Photoluminescence studies indicate considerable reduction in emission intensity which appears to arise from the distortion of the lattice around the Er3+ ion caused by the defect centres. An explanation of the observations is suggested on the basis of impurity ion-defect centre formation. (C) 1998
URI: http://dx.doi.org/10.1016/S0168-583X(97)00732-5
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6912
http://hdl.handle.net/10054/6912
Date: 1998


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